Contaimination
[化] 染菌
🗣️ 情景例句
You're right.
你说的对。
In secondary school, children get more advanced knowledge.
中学的小孩会得到进一步的知识。
Experiments have proved that children can be instructed in swimming at a very early age.
实验证明，儿童在很小的时候就可以开始学习游泳。